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LCD1602程序代码及显示流程图
LCD1602程序代码及显示流程图
lcd1602显示程序代码
前些天弄了最小系统板后就想着学习1602的显示程序，可惜坛子里的或网上的，都没有简单的1602显示程序，无柰在网上下载了一段经过反复修改测试，终于有了下面一段代码：
// – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
// – – 初始化接口
# define LCD_DB P0 // – – P0 = DB0～DB7
sbit LCD_RS=P2 ; // – – p2.0 = RS
sbit LCD_RW=P2; // – – p2.1 = RW
sbit LCD_E=P2; // – – p2.2 = E
// – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
// – – 定义函数
# define uchar unsigned char
# define uint unsigned int
// – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
// – – 定义子程序函数
void LCD_init(void); // – – 初始化LCD1602函数
void LCD_write_command(uchar command); // – – 向LCD1602写指令函数
void LCD_write_data(uchar dat); // – – 向LCD1602写数据函数
void LCD_set_xy(uchar x，uchar y); // – – 设置LCD1602显示位置 X(0-16)，y(1-2)
void LCD_disp_char(uchar x，uchar y，uchar dat); // – – 在LCD1602上显示一个字符
void LCD_disp_string(uchar X，uchar Y，uchar *s); // – – 在LCD1602上显示一个字符串
//void LCD_check_busy(void);//检查忙函数。我没用到此函数，因为通过率极低。
void LCD_delay_10us(uint n); // – – 10微秒的延时子程序
void LCD_delay_50us(uint n); // – – 50微秒的延时子程序
// – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
// – – 初始化LCD1602
void LCD_init(void)
{
LCD_delay_10us(20);
LCD_write_command(0x38); // – – 设置8位格式，2行，5×7
LCD_delay_10us(5);
LCD_write_command(0x0c); // – – 整体显示，关光标，不闪烁
LCD_delay_10us(5);
LCD_write_command(0x06); // – – 设定输入方式，增量不移位
LCD_delay_10us(5);
LCD_write_command(0x01); // – – 清除屏幕显示
LCD_delay_50us(40);
}
//********************************
// – – 向LCD1602写指令
void LCD_write_command(uchar dat)
{
LCD_delay_10us(5);
LCD_RS=0; // – – 指令
LCD_RW=0; // – – 写入
LCD_DB=dat;
LCD_delay_10us(5);
LCD_E=1; // – – 允许
LCD_delay_10us(5);
LCD_E=0;
}
// – – 向LCD1602写数据
void LCD_write_data(uchar dat)
{
LCD_delay_10us(5);
LCD_RS=1;// – –
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